Search: id:A101436
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%I A101436
%S A101436 0,0,0,1,0,0,0,1,1,0,0,1,0,0,0,0,0,1,0,1,0,0,0,1,1,0,1,1,0,0,0,1,0,0,0,
%T A101436 2,0,0,0,1,0,0,0,1,1,0,0,0,1,1,0,1,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,1,0,0,
%U A101436 0,2,0,0,1,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,1,0,0,0,1,0,1,1,2,0,0,0,1,0
%N A101436 Number of exponents in prime factorization of n which are primes.
%C A101436 First occurrence of k: 1,4,36,900,44100 (A061742). - Robert G. Wilson 
               v (rgwv(AT)rgwv.com), Jan 25 2005
%H A101436 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%e A101436 36 = 2^2 *3^2. Since 2 is a prime and occurs twice as an exponent in 
               the prime factorization of 36, a(36) = 2.
%t A101436 f[n_] := Length[ Select[ Flatten[ Table[ #[[2]], {1}] & /@ FactorInteger[n]], 
               PrimeQ[ # ] &]]; Table[ f[n], {n, 105}] (from Robert G. Wilson v 
               Jan 25 2005)
%Y A101436 Sequence in context: A133698 A093956 A160383 this_sequence A056170 A059483 
               A067618
%Y A101436 Adjacent sequences: A101433 A101434 A101435 this_sequence A101437 A101438 
               A101439
%K A101436 nonn
%O A101436 1,36
%A A101436 Leroy Quet, Jan 18 2005
%E A101436 More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 25 2005

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